Obsolete Names for ICS Units

The interval definitions in this timescale are derived from the following sources:

  • W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
  • K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
  • J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view
  • F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
  • M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 view
  • A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view
  • J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
  • F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
  • F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 55 timescales which overlap this one. show

Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

Interval names marked with † are no longer in current use.

This timescale is used in the definition of 92 collections

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International Chronostratigraphic TimescaleObsolete Names for ICS UnitsPermian-Jurassic of New ZealandPermian of the PamirsCentral Paratethys StagesSilurian of the BalticNorth American Land Mammal AgesPermian of ChinaAmmonite Chrons of Northwest EuropeMesozoic SubagesPermian of North AmericaObsolete Carboniferous Ages of China
QuaternaryHoloceneMeghalayanSaintaugustinean0
Santarosean0.0004
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate Pleistocene0.0117
Rancholabrean0.014
Chibanian0.129
Irvingtonian0.21
Calabrian0.774
Blancan1.4
Gelasian1.8
NeogenePliocenePiacenzianTertiary †2.58
Zanclean3.6
Hemphillian4.7
MioceneMessinian5.333
TortonianPannonian7.246
Clarendonian9.4
SerravallianSarmatian11.63
Barstovian12.5
Badenian12.8 *
Langhian13.82
Burdigalian15.98
Hemingfordian16.3
Arikareean18.5
Aquitanian20.44
PaleogeneOligoceneChattian23.03
Rupelian27.82
Whitneyan29.5
Orellan31.8
EocenePriabonianChadronian33.9
Duchesnean37
Bartonian37.71
Uintan39.7
Lutetian41.2
Bridgerian46.2
Ypresian47.8
Wasatchian50.5
Clarkforkian54.9
PaleoceneThanetian56
Tiffanian56.2
Selandian59.2
Torrejonian60.9
Danian61.6
Puercan63.8
CretaceousLate CretaceousMaastrichtianLate Maastrichtian/Early Maastrichtian66
CampanianLate Campanian/Middle Campanian/Early Campanian72.1
SantonianLate Santonian/Middle Santonian/Early Santonian83.6
ConiacianLate Coniacian/Middle Coniacian/Early Coniacian86.3
TuronianLate Turonian/Middle Turonian/Early Turonian89.8
CenomanianLate Cenomanian/Middle Cenomanian/Early Cenomanian93.9
Early CretaceousAlbianLate Albian100.5
Middle Albian106.2 *
Early Albian109.9 *
AptianLate Aptian113
Early Aptian119.5 *
BarremianLate Barremian/Early Barremian121.4
HauterivianLate Hauterivian/Early Hauterivian125.77
ValanginianLate Valanginian/Early Valanginian132.6
BerriasianLate Berriasian139.8
Middle Berriasian140.6 *
Early Berriasian142.7 *
JurassicLate JurassicTithonianOtekePuaroanLate TithonianMiddle Tithonian145
Early Tithonian146.3 *
KimmeridgianLate Kimmeridgian149.2
KawhiaOhauan150
Early Kimmeridgian152.2 *
Heterian154.5
OxfordianLate OxfordianMiddle Oxfordian/Early Oxfordian154.8
157.9 *
Middle JurassicCallovianLate Callovian/Middle Callovian/Early Callovian161.5
Temaikan164.3
BathonianLate Bathonian/Middle Bathonian/Early Bathonian165.3
BajocianParkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/DiscitesLate Bajocian168.2
Humphresianum168.4
Early Bajocian168.6 *
AalenianConcavum/Murchisonae/OpalinumLate Aalenian/Middle Aalenian/Early Aalenian170.9
Early JurassicToarcianLevesquei/Variabilis/BifronsThouarsenseLate Toarcian174.7
HerangiUruroan176
180.1
Middle Toarcian180.4 *
Serpentinum/Falciferum/Tenuicostatum182
Early Toarcian182.9 *
PliensbachianSpinatum/Margaritatus/Davoei/Ibex/JamesoniLate Pliensbachian/Early Pliensbachian184.2
Aratauran188.9
SinemurianRaricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/BucklandiLate Sinemurian/Early Sinemurian192.9
HettangianAngulata/Liasicus/PlanorbisLate Hettangian/Middle Hettangian/Early Hettangian199.5
TriassicLate TriassicRhaetianBalfourOtapirian201.4
NorianWarepanSevatian208.5
Alaunian213.2 *
Lacian216.7 *
Otamitan217
Oretian221
CarnianTuvalian227
GoreKaihikuan227.5
Julian233.4 *
Middle TriassicLadinianLongobardian237
Etalian238
Fassanian239.7 *
AnisianIllyrian242
Pelsonian243.8 *
Bithynian244.7 *
Aegean245.5 *
Malakovian246
Early TriassicOlenekianSpathian247.2
Smithian248.9 *
Nelsonian249
InduanDienerian251.2
Griesbachian251.4 *
DUrvilleMakarewan251.5
PermianLopingianChanghsingianDorashamianMeishanian251.902
Waiitian253.2
Baoqingian253.4 *
WuchiapingianLongtanian †DzhulfianLaoshanian254.14
Puruhauan254.2
Laibinian257.7 *
GuadalupianCapitanianAparimaFlettianMidianLengwuanCapitanian259.51
WordianKuhfengianWordian264.28
Barettian266
Murgabian266.2 *
RoadianRoadian266.9
CisuralianKungurianKubergandianLuodianianLeonardianCathedralian273.01
Mangapirian276
Bolorian279.8
Hessian281.9 *
Artinskian283.5
Telfordian285
Longlinian285.4 *
Yakhtashian286
WolfcampianLenoxian286.1 *
288.5
SakmarianSakmarian290.1
AsselianAsselianZisongianNealian293.52
CarboniferousPennsylvanianGzhelianMapingian †298.9
300.1
Kasimovian303.7
305.9
Moscovian307
Bashkirian315.2
MississippianSerpukhovian323.2
Visean330.9
Tournaisian346.7
DevonianLate DevonianFamennian358.9
Frasnian372.2
Middle DevonianGivetian382.7
Eifelian387.7
Early DevonianEmsian393.3
Pragian407.6
Lochkovian410.8
SilurianPridoliOhesaare419.2
Kaugetuma421.7 *
LudlowLudfordianKuressaare423
Paadla423.4 *
Gorstian425.6
WenlockHomerianRootsikula427.4
Jaagarahu429.2 *
Sheinwoodian430.5
Jaani431.8 *
LlandoveryTelychian433.4
Adavere434 *
Aeronian438.5
Raikkula439.4 *
Rhuddanian440.8
Juuru441.4 *
OrdovicianLate OrdovicianHirnantian443.8
Katian445.2
Sandbian453
Middle OrdovicianDarriwilian458.4
Dapingian467.3
Early OrdovicianFloian470
Tremadocian477.7
CambrianFurongianStage 10485.4
Jiangshanian489.5
Paibian494
MiaolingianGuzhangianSeries 3 †497
Drumian500.5
WuliuanStage 5 †504.5
509